WORK OF PREVENTIVE MAINTENANCE AMC OF 220/132/33 KV EQUIPMENTS AT 220 KV SUBSTATION SIDCUL HARIDWAR

Amount

Following Work to be carried out for preventive maintenance of 2 No. 160 MVA T/F (220/132 KV), 2 No. 80 MVA T/F (132/33 KV), 1 No. 50 MVA T/F (220/33 KV & 1 No. 25 MVA T/F (220/33 KV) (Two times in a year 6 x 2 times = 12). 1. Checking of Oil level in main & OLTC conservator tank & bushings. 2. Attending minor Oil leakage/ seepage from main body/conservator tank/radiator of transformer by tightening. 3. Tightening of all bushing clamps & replacement of damage/defected clamps & connectors. 4. Rectification of electrical fault of auto/ manual operation of cooling fans by replacement of electrical equipment like contactor, MCB, relay etc. 5. Tightening of neutral & main body earthling. 6. Cleaning & washing of transformer main tank/ radiator etc. 7. Tightening of all electrical connections in Transformer Marshalling Box & apply CRC on all connections/ connectors/relays etc. 8. Testing of WTI & OTI and Buchholz relay & PRV. 9. Checking of earth resistance. 10. Replacement of Jumpers of conductor including clamps, cutting/drilling in holes in clamps. 11. Work of special maintenance on breakdown/crisis basis/fault tracing & removal or any other work as per site requirement or as per direction of site incharge. .

Following work to be carried out for Preventive maintenance of 220 KV, 132 KV, 220/132 KV, 220/33 KV Isolators (Two times in a year 28 x 2 times = 56). 1. Tightening of clamps and connectors & replace if found damage/defective. 2. Cleaning of porcelain insulators by CTC and checking of damage. 3. Replacement of rusted nut/bolts of Isolator/ hardware fittings. 4. Tightening of male and female contacts and replace if found damage/defective. 5. Apply petroleum jelly between male/female contacts. 6. Tightening of earth link and its jaws. 7. Alignment of isolator and earth link. 8. Lubrication of all moving parts. 9. Testing of drive motor in cubical. 10. Tightening of all connections in Bay Marshalling Box. 11. Apply CRC on all connections in cubical. 12. Replacement of Jumpers of conductor including clamps, cutting/drilling in holes in clamps. 13. Work of special maintenance on breakdown/crisis basis/fault tracing & removal or any other work as per site requirement or as per direction of site incharge.

Following work to be carried out for Preventive maintenance of 220 KV Bay, 132 KV Bay, 220/132 KV Bay & 220/33 KV Bay Equipments. i.e. CB/CT/PT/CVT/LA/Wave Trap (if installed) (Two times in a year 78 x 2 times = 156 ). 1. Top up of oil after checking of oil level in CT/PT/CVT. 2. Checking of oil leakage and rectification if found. 3. Checking and tightening of clamps & Connectors etc. 4. Replacement of rusted nut/bolts if found damage in hardware fitting. 5. Checking and tightening of equipments earthling. 6. Checking the healthiness of surge arrester. 7. Filling of SF-6 Gas in Circuit Breaker under breakdown/preventive maintenance including shifting of SF-6 gas cylinder. 8. Replacement of Jumpers of conductor including clamps, cutting/drilling in holes in clamps. 9. Work of special maintenance on breakdown/crisis basis/fault tracing & removal or any other work as per site requirement or as per direction of site incharge.

Taking specific gravity of individual cell (110 cells) of battery set and record in battery register & checking level of electrolyte in the cell and filling of distilled water by making of distill water in distill water plant as per requirement.

Cleaning of bettery terminals and apply petrolium jelly on the terminals & cleaning of battery set rack.

Cleaning & maintenance of distill water plant by replacement of heating element, switches & cabling etc.

Checking of voltage of individual cell after turning off the battery charger of each battery set.

Chirag Construction company

M/s Singhal and Co

KOTHARI ENTERPRISES